/Engine/Source/Runtime/SlateCore/Public/Layout/Geometry.h
Absolute coordinates could be either desktop or window space depending on what space the root of the widget hierarchy is in.
Transforms AbsoluteCoordinate into the local space of this Geometry.
[UE::Slate::FDeprecateVector2DResult](API\Runtime\SlateCore\Types\FDeprecateVector2DResult) AbsoluteToLocal ( [UE::Slate::FDeprecateVector2DParameter](API\Runtime\SlateCore\Types\FDeprecateVector2DParameter) AbsoluteCoordinate ) const